Thanks for all your comments, the DIR-655 and DAP-1522 and 1353 are pounds 100 UK Pounds, so by comparison they are expensive.
While i know this is a D-Link forum i thought i would share what i have done.
My DIR-655 is in my office, its has wired and wireless connections, a wire from this router goes around my house to my living room, where i wanted the new connections to be available. I went to a local store (Argos) and bought a Buffalo WHR-G300N Access Point and Bridge for 38 UK Pounds. It was a long shot as i didnt think it would work. After setting the Buffalo's IP to the same as the existing network and providing it with the gateway ip (DIR-655) is was up and running.
Now i haven't extended my wireless range, just created a new wireless access point, so i have 2 wireless points in my house with different SSID's. The good thing about this is that i can also use the wired ports on the back of the Buffalo unit as well.
Many thanks for your help and comments, hope my information is helpful to someone,
Cheers